Six-Element Optical Lens Assembly for Compact Wide-Angle Imaging
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Solution Overview
Problem
Conventional optical systems struggle to balance image quality, sensitivity, aperture size, system volume, and field of view, making it challenging to meet the diverse requirements of modern electronic devices with improved image sensors.
Innovation Solution
A photographing optical lens assembly comprising six optical elements, each with specific refractive powers and surface configurations, including convex and concave surfaces, inflection points, and optical path folding, to achieve a balanced design that corrects aberrations and enhances image quality while reducing size and improving flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional optical systems use traditional lens designs, then image quality and sensitivity can be maintained, but the system volume and complexity increase
Solution Approach 1:
The optical system is divided into six distinct optical elements (first through sixth optical elements) with specific refractive powers and surface configurations. Each element is segmented to perform specific functions: the first and fourth elements have positive refractive power for light convergence, while the second, third, fifth, and sixth elements have negative refractive power for light divergence and aberration correction. This segmentation allows compact design while maintaining image quality.
Solution Approach 2:
Different regions of the optical elements have different surface curvatures and refractive properties. The object-side and image-side surfaces of each optical element are designed with specific curvature radii (e.g., R1-R12) to optimize local optical performance. The inflection points on the surfaces create localized regions with different refractive characteristics to correct specific aberrations at different zones of the optical path.
2Use of energy by moving object
If aperture size is increased to improve light-gathering capability, then sensitivity improves, but system volume and field of view are compromised
Solution Approach 1:
The optical system uses specific refractive index values (e.g., N1=1.545, N2=1.545, N3=1.615, N4=1.551, N5=1.529, N6=1.697) and curvature radii (R1-R12) to optimize the balance between aperture size, field of view, and system volume. The inflection points on the optical surfaces create localized refractive changes that enhance light-gathering capability without increasing physical dimensions.
3Adaptability or versatility
If field of view is widened to capture more scene, then adaptability improves, but image quality and sensitivity are compromised
Solution Approach 1:
The optical elements with inflection points act as intermediaries to correct aberrations introduced by wide-angle viewing. The specific curvature configurations (e.g., concave object-side surfaces for elements 2, 3, 5, 6) serve as intermediary structures that compensate for the aberrations inherent in wide field of view designs, maintaining image quality while achieving broad adaptability.
4Volume of moving object
If optical path is folded to reduce size, then system volume decreases, but aberrations increase
Solution Approach 1:
The optical system employs a composite design with six different optical elements, each having specific refractive indices and surface configurations. The combination of positive and negative refractive power elements creates a composite optical path that corrects aberrations while maintaining compact size. The inflection points on the surfaces provide additional degrees of freedom to control and correct optical aberrations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The lens assembly effectively balances image quality, sensitivity, and field of view, allowing for a compact design with improved light-gathering capabilities and reduced aberrations, suitable for diverse applications in electronic devices.
Implementation Method 1
Each of the six optical elements has positive or negative refractive power, with specific curvature radii for object-side and image-side surfaces, to control light paths and correct optical aberrations
Data Source
AI summary
A photographing optical lens assembly includes six optical elements which are, in order from an object side to an image side along an optical path: a first optical element, a second optical element, a third optical element, a fourth optical element, a fifth optical element and a sixth optical element. Each of the six optical elements has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The first optical element has positive refractive power. The object-side surface of the first optical element is convex in a paraxial region thereof. The fourth optical element has positive refractive power. The object-side surface of the fourth optical element is convex in a paraxial region thereof.